KR20210108613A - Workpiece cutoff confirmation apparatus of machine tool and method thereof - Google Patents

Abstract

The present invention relates to an apparatus for confirming cutting of a workpiece in a machine tool and a confirmation method thereof. While a sub-spindle clamps a workpiece pre-machined in a main spindle in a machine tool equipped with two spindles, before machining the pre-machined workpiece with the sub-spindle by comparing a positional deviation of the main spindle or sub spindle with a reference current value set in various ways depending on a type and thickness of the workpiece and a machining program, it is automatically checked whether the pre-machined workpiece is cut or not. Therefore, malfunction of the machine tool is prevented and compatibility and versatility are maximized. In addition, user's convenience is improved, and unnecessary configuration of a machine unit is removed, so it is possible to reduce a size of the machine tool. The apparatus for confirming cutting of the workpiece in the machine tool of the present invention comprises: the main spindle; the sub spindle; a cutting unit; and a control unit.

Description

Workpiece cutoff confirmation apparatus of machine tool and method thereof

The present invention relates to an apparatus and method for confirming work cut of a machine tool, and more particularly, in a machine tool having two spindles, the main spindle or the sub-spindle is clamped simultaneously on the main spindle and the sub-spindle through the positional deviation of the main spindle By automatically checking whether the workpiece clamped on either the spindle or the sub-spindle is cut, the overall manufacturing cost of the machine tool is reduced, the machine tool is miniaturized, the machining productivity is increased, and the reliability and stability of the machine tool It relates to a workpiece cutting confirmation device and confirmation method of a machine tool for maximizing the

In general, a machine tool refers to a machine used for the purpose of processing a metal/non-metal workpiece into a desired shape and size using an appropriate tool by various cutting or non-cutting methods.

Various types of machine tools, including turning centers, vertical/horizontal machining centers, door machining centers, Swiss turns, electric discharge machines, horizontal NC boring machines, and CNC lathes, are widely used in various industrial sites for their respective purposes.

In general, various types of machine tools currently used have an operation panel to which numerical control (NC) or computerized numerical control (CNC) technology is applied. Such an operation panel is provided with various function switches or buttons and a monitor.

In addition, the machine tool includes a table on which a workpiece material is seated and transferred for processing the workpiece, a pallet for preparing the workpiece before processing, a spindle that rotates when a tool or workpiece is combined, a tailstock for supporting the workpiece, etc. during processing, a vibration isolator etc. are provided.

In general, in a machine tool, a table, a tool rest, a main shaft, a tailstock, a vibration isolator, etc. are provided with a conveying unit which conveys along a conveying axis in order to perform various processing.

In general, turning means rotating a workpiece, which is a material, and cutting a workpiece by contacting a cutting tool with the workpiece. In addition, today, products processed through turning have a variety of shapes and require high-precision machining, and a reduction in machining time is required.

As an example of a typical product for which such a turning process is used, a work piece having an elongated shape is used, and such a work piece has a form in which the length of the product is cut relatively short during turning.

In addition, one workpiece is continuously supplied, processed and cut, the cut part becomes a product, and the next cut part is supplied to the machining area to perform turning, and this turning method is called a swiss turn. referred to in a way

Today, lathes or turning centers including Swiss turn are typically used for turning, and as described above, in order to increase productivity and reduce machining time, two spindles are provided to process products with complex shapes other than the Swiss turn method. And, it is manufactured and used for the purpose of machining the surface other than the machined surface in the state of being clamped on one spindle.

In addition, in order to process a workpiece in a Swiss turn having two spindles or a turning center having two spindles, the workpiece must be cut and the cut state must be confirmed.

As such, in order to quickly check whether a material is cut in a machine tool having two spindles, including a Swiss turn or a turning center, an apparatus and method for checking the work piece cutting of a mechanical machine tool have been invented.

Specifically, as shown in FIG. 1 , the workpiece cutting confirmation device and confirmation method of a small tool are provided with a first spindle 2 and a second spindle 3 , and the material 5 is cut with a cutting device 4 . When the cutting inspection device equipped with a touch sensor, etc., enters the processing area and moves to check whether the material is cut or not, when the cutting check is completed, the cutting inspection device moves away from the processing area again, and then processing is performed.

As such, the conventional machine tool cutting device and checking method has a problem in that the productivity of the machine tool is lowered as it takes a lot of time to check whether the workpiece is cut in a mechanical way.

In addition, in the conventional machine tool, the workpiece cutting confirmation device and the confirmation method increase the overall manufacturing cost of the machine tool as it must be additionally provided with various machine components, causing a burden on consumers, and it is not possible to reduce the size of the machine tool, There was a problem in that space utilization was reduced.

To solve this problem, in Korean Patent Laid-Open Publication No. 10-2005-0066787, a device and a method for confirming cutting of a workpiece for a machine tool were developed to check whether the workpiece was cut by checking the distance by the forward/backward movement of the sub spindle. .

However, the conventional machine tool cutting confirmation device and confirmation method of a conventional machine tool, not a mechanical method, judges whether the workpiece is cut only by moving the distance based on a uniform standard without considering the type, thickness, or processing program of the work piece. There was a problem in that the accuracy was lowered, and the reliability and stability of the machine tool cutting confirmation device and confirmation method were lowered.

In addition, the workpiece cutting confirmation apparatus and confirmation method of a conventional machine tool of a control method, not a mechanical method, can be applied only to one simple workpiece and cannot be accurately applied to a variety of workpieces. Deviation is not taken into account, so when the workpiece is changed, or in the case of a novice user with no experience, it is not possible to check the cutting of the workpiece in a controlled way, which causes inconvenience to users, and the overall manufacturing cost of the machine tool due to the increase in unnecessary configuration However, there was a problem in that the processing cost increased because it took a lot of time and money to set up and operate the equipment.

Moreover, as the conventional machine tool's workpiece cutting confirmation device and confirmation method, which is not a mechanical method, does not reflect the real-time equipment operation status according to the operation of the equipment, the versatility decreases, compatibility is reduced, and in the case of a cutting error As it was designed without considering the discharge of the workpiece, there was a problem in that the productivity of the machine tool was decreased by increasing the non-working time.

Accordingly, while operating in a control method rather than a mechanical method, the type, thickness, and processing program of the workpiece are taken into consideration, and at the same time, the machine tool automatically checks whether the workpiece is cut according to the operating state of the machine tool in real time, and when a cutting error occurs There is an urgent need to develop an apparatus and method for confirming the cutting of a workpiece for a machine tool that can quickly discharge the corresponding workpiece.

Korean Patent Publication No. 10-2000-0046975 Korean Patent Publication No. 10-2011-0064386 Korean Patent Laid-Open Publication No. 10-2005-0066787

SUMMARY OF THE INVENTION The present invention is to solve the above problems, and an object of the present invention is to clamp the processed workpiece to one of the main spindle and the sub spindle in a machine tool having two spindles at the same time to the main spindle and the sub spindle. In the state of being clamped to either the main spindle or the sub-spindle, the positional deviation of the main spindle and/or sub-spindle is compared with the reference current values set variously according to the type, thickness, and machining program of the workpiece, and the main spindle or sub-spindle By automatically checking whether the workpiece clamped on the main spindle or sub-spindle is cut before machining the clamped workpiece, machine tool malfunction is prevented, compatibility and versatility are maximized, user convenience is improved, and unnecessary machine parts are removed. It is to provide an apparatus and a confirmation method for confirming a workpiece cut of a machine tool capable of reducing the size of the machine tool by eliminating the configuration.

In addition, another object of the present invention is to correct in real time the reference current amount and error range of the position deviation for checking whether the workpiece is cut or not, and variously change according to the workpiece information and the processing program according to the type of the workpiece and the thickness of the workpiece The machine tool maximizes the productivity of the machine tool by reducing non-working time, maximizes the stability and reliability of the machine tool, and prevents malfunctions by automatically and accurately and quickly checking whether the workpiece is being cut by the type of workpiece and the machining program. It is an object to provide a machine tool cutting confirmation device and method for preventing damage or breakage of tools or other equipment by increasing the lifespan of the machine tool and reducing the maintenance cost of the machine tool.

In order to achieve the object of the present invention, there is provided an apparatus for confirming cutting of a work piece of a machine tool according to the present invention, comprising: a main spindle clamping the work piece to process the work piece; a sub-spindle clamped to the main spindle to clamp the machined workpiece; a cutting unit for cutting the workpiece clamped to at least one of the main spindle and the sub spindle; and a control unit configured to check whether a workpiece clamped simultaneously on the main spindle and the sub-spindle or clamped on one of the main spindle and the sub-spindle is cut.

In addition, in a preferred embodiment of the device for confirming work cut of a machine tool according to the present invention, the control unit of the device for confirming cutting of the work piece of the machine tool is simultaneously clamped to the main spindle and the sub-spindle, or one of the main spindle and the sub-spindle. By comparing the positional deviation of the main spindle or the sub-spindle in a state in which the workpiece clamped to any one is simultaneously clamped to the main spindle and the sub-spindle or clamped to any one of the main spindle and the sub-spindle You can check whether the workpiece is cut or not.

In addition, in a preferred embodiment of the device for confirming the cutting of the work piece of the machine tool according to the present invention, the positional deviation of the device for confirming the cut of the work piece of the machine tool is the linear feed of the main spindle or the sub spindle or the main spindle or the sub spindle It can be created by rotation of

In addition, in a preferred embodiment of the workpiece cutting confirmation device of the machine tool according to the present invention, the control unit of the workpiece cutting confirmation device of the machine tool stores information for confirming whether the workpiece clamped to the sub-spindle is cut wealth; an analysis unit that compares the information stored in the storage with a positional deviation of the main spindle or the sub-spindle to analyze whether the workpiece clamped to the sub-spindle is cut; and a processing unit for checking whether the workpiece clamped on the sub-spindle is cut according to the result of the analysis unit.

In addition, in a preferred embodiment of the workpiece cutting confirmation device of the machine tool according to the present invention, the storage unit of the workpiece cutting confirmation device of the machine tool is a workpiece data storage unit for storing the workpiece information for the workpiece type and workpiece thickness; a machining program storage unit for storing a machining program for machining a workpiece; and a reference data storage unit configured to store a reference current value, a maximum current value, a minimum current value, or an error range set based on the work information and the machining program.

In addition, in a preferred embodiment of the workpiece cutting confirmation apparatus of the machine tool according to the present invention, the analysis unit of the workpiece cutting confirmation apparatus of the machine tool is a confirmation unit for confirming the clamping or unclamping state of the main spindle and the sub-spindle; a detection unit configured to detect a positional deviation of the main spindle or the sub-spindle in a state in which the sub-spindle is clamped to the main spindle and the processed workpiece is clamped; and a comparison unit that compares the positional deviation detected by the detection unit with a reference current value stored in the reference data storage unit.

In addition, in a preferred embodiment of the apparatus for confirming work cut of a machine tool according to the present invention, the processing unit of the apparatus for confirming cut of the work piece of the machine tool is compared with the comparison result of the comparison unit and the positional deviation detected by the detection unit and the reference data storage unit When the difference between the stored reference current values is within the error range, a cutting confirmation command signal is generated to perform the machining of the workpiece clamped on the sub-spindle. a command unit for outputting a cutting error command signal to stop; and an alarm unit for warning a cutting error when a cutting error command signal is output according to the result of the command unit and outputting an alarm signal for collecting the workpiece clamped to the sub-spindle.

In addition, in a preferred embodiment of the workpiece cutting confirmation device of the machine tool according to the present invention, the processing unit of the workpiece cutting confirmation device of the machine tool when the cutting confirmation command signal or the cutting error command signal is output through the command unit. The position deviation detected from the detection unit is stored in real time, and the data stored in real time is compared with the reference current value and the error range stored in the reference data storage unit, and the reference current value and the error range stored in the reference data storage unit are measured in real time. It may further include a correction unit for correcting the .

In addition, in a preferred embodiment of the workpiece cutting confirmation apparatus of the machine tool according to the present invention, the control unit of the workpiece cutting confirmation apparatus of the machine tool includes a selection unit for selecting an automatic confirmation mode of whether the workpiece clamped to the sub-spindle is cut; and a display unit displaying the results of the storage unit, the analysis unit, and the processing unit.

In order to achieve another object of the present invention, the control method of a machine tool according to the present invention is to check whether the workpiece clamped on the sub spindle is cut before processing by clamping the workpiece clamped to the main spindle with the sub spindle. storing information for receiving a signal for checking whether the workpiece clamped on the sub-spindle is cut; checking a clamping or unclamping state of the workpiece clamped to the sub-spindle; Detecting a positional deviation of the main spindle or the sub-spindle in a state in which the sub-spindle clamps the workpiece clamped simultaneously to the main spindle and the sub-spindle or clamped to any one of the main spindle and the sub-spindle ; comparing the detected positional deviation with a reference current value; and when the difference between the detected positional deviation and the reference current value according to the comparison result is within the error range, the sub-spindle outputs a cutting confirmation command signal to perform machining of the clamped workpiece, and exceeds the error range It may include; outputting a cutting error command signal to stop the machining of the clamped workpiece in the sub-spindle.

In addition, in a preferred embodiment of the method for controlling a machine tool according to the present invention, the control method of the machine tool warns of a cutting error when a cutting error command signal is output after the step of outputting the command signal, and the sub spindle It may include; outputting an alarm signal for collecting the workpiece clamped to the.

In addition, in a preferred embodiment of the control method of the machine tool according to the present invention, the control method of the machine tool is a position detected when the cutting confirmation command signal or the cutting error command signal is output after the step of outputting the alarm signal It may include; storing the deviation in real time, comparing the data stored in real time with the reference current value and the error range, and correcting the pre-stored reference current value and the error range in real time.

In a machine tool having two spindles, the workpiece cutting confirmation apparatus and method according to the present invention are clamped to either the main spindle and the sub-spindle and the processed workpiece is clamped to the main spindle and the sub-spindle at the same time, or the main spindle Machining the workpiece clamped on the sub spindle by comparing the positional deviation of the main spindle and/or sub spindle with reference current values set variously according to the type and thickness of the workpiece and the machining program while being clamped on either the sub spindle and the sub spindle. By automatically checking whether the workpiece clamped on the sub-spindle is cut before, malfunction of the machine tool is prevented, and damage or damage to the tool or other equipment caused by the malfunction is prevented, thereby increasing the life of the machine tool and maintaining the machine tool. It has the effect of reducing costs.

In addition, the apparatus and method for checking the workpiece cutting of a machine tool according to the present invention control the presence or absence of cutting of the workpiece clamped by the main spindle and the sub-spindle in a machine tool having two spindles through positional deviation by linear transfer or rotation It is possible to improve the user's convenience by quickly and automatically checking the machine tool, reduce unnecessary machine parts, and reduce the overall manufacturing cost of the machine tool.

Furthermore, the apparatus and method for confirming cutting of a workpiece for a machine tool according to the present invention provides a reference current amount and error range of positional deviation for checking whether a workpiece clamped on a main spindle and a sub-spindle is cut in a machine tool having two spindles. In real-time correction of the workpiece and various changes and settings according to the workpiece information and processing program according to the type of workpiece and the thickness of the workpiece. It has the effect of maximizing the stability and reliability of the machine tool.

In addition, the workpiece cutting confirmation device and method for a machine tool according to the present invention is clamped to either one of the main spindle and the sub-spindle in a machine tool having two spindles so that the processed workpiece is clamped to the main spindle and the sub-spindle at the same time or Machining the workpiece clamped on the sub spindle by comparing the positional deviation of the main spindle or sub spindle with reference current values set variously according to the type, thickness, and machining program of the workpiece while it is clamped on either the main spindle or the sub spindle. The automatic check of whether the workpiece clamped on the sub-spindle has been cut before can be easily applied to various types of machine tools depending on the workpiece type and machining program, increasing versatility and compatibility, and enabling rapid application to the machine tool. This has the effect of maximizing the productivity of the machine tool by reducing the non-working time and reducing the processing cost.

1 shows a conceptual diagram of a workpiece cutting confirmation device of a conventional machine tool.
Figure 2 shows a conceptual diagram of the workpiece cutting confirmation device of the machine tool according to the present invention.
Figure 3 shows a perspective view of a machine tool in a state in which the workpiece cutting confirmation device of the machine tool according to the present invention is installed.
Figure 4 shows a block diagram of the configuration of the control unit of the workpiece cutting confirmation device of the machine tool according to the present invention.
5 shows a graph of positional deviation in a state in which the cutting is normally performed in the device and method for confirming the cutting of the workpiece of the machine tool according to the present invention.
6 shows a graph for positional deviation in a state in which the cutting is abnormally performed in the device and method for confirming the cutting of the workpiece of the machine tool according to the present invention.
7 shows a flowchart of a method for confirming the cutting of a work piece of a machine tool according to the present invention.

Hereinafter, it will be described in detail with reference to the drawings of the workpiece cutting confirmation device and confirmation method of the machine tool according to an embodiment of the present invention. The embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. And, in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numbers refer to like elements throughout.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of description.

The terminology used herein is for the purpose of describing the embodiments, and thus is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprise” and/or “comprising” refers to the presence of one or more other components, steps, operations, and/or elements mentioned. or addition is not excluded.

Figure 2 shows a conceptual diagram of a machine tool cutting confirmation device according to the present invention, Figure 3 shows a perspective view of the machine tool in a state in which the workpiece cutting confirmation device of the machine tool according to the present invention is installed, Figure 4 is in the present invention It shows a block diagram of the configuration of the control unit of the workpiece cutting confirmation device of the machine tool by the 5 shows a graph for positional deviation in a state in which cutting is normally performed in the apparatus and method for confirming and confirming the cutting of a workpiece for a machine tool according to the present invention, and FIG. shows a graph of the positional deviation in the state in which the cut is abnormally performed. 7 is a flowchart showing a method for confirming the cutting of the work piece of the machine tool according to the present invention.

2 to 4 will be described with reference to the workpiece cutting confirmation device (1) of the machine tool according to the present invention. 2 to 4, the workpiece cutting confirmation device 1 of the machine tool according to the present invention includes a main spindle 100, a sub spindle 200, a cutting unit 300, and a control unit 400 do.

The main spindle 100 clamps the workpiece 50 to machine the workpiece 50 .

The sub spindle 220 is installed adjacent to the main spindle 100 and clamped to the main spindle 100 to process the workpiece 51 that has been machined first. That is, the sub-spindle 200 may simply newly process the pre-machined workpiece clamped to the main spindle if necessary, or may be clamped to another surface or the same surface of the pre-machined workpiece clamped to the main spindle by clamping it to obtain a different type of workpiece. processing can be performed.

The cutting unit 300 cuts the workpiece clamped to at least one of the main spindle and the sub spindle. That is, the cutting unit cuts the workpiece clamped to at least one of the main spindle and the sub spindle in order to process the workpiece clamped to the main spindle and machined to the sub-spindle in a state where the sub-spindle is clamped. Specifically, the cutting unit 300 processes the workpiece clamped to the main spindle with a tool, and then a part of the workpiece clamped to the main spindle is clamped by the sub spindle in order to perform additional processing on another surface or the same surface of the workpiece. The workpiece clamped on at least one of the main spindle and the sub-spindle is cut. The cutting unit 300 may be formed as a separate cutting device, or may be cut through a cutting tool installed on the main tool rest.

Figure 3 specifically exemplifies a Swiss turn as a machine tool in a state to which the workpiece cutting confirmation device 1 of the machine tool according to the present invention is applied. However, the present invention is not necessarily limited thereto and may be variously applied to a turning center, a lathe, a machining center, and the like. With reference to FIG. 3, the configuration of the workpiece cutting confirmation device 1 of the machine tool according to the invention according to the present invention will be described in more detail.

The bed 10 is installed on the ground, and the main spindle 100 is movably installed on the top of the bed 10 by the main driving unit 30 . In addition, the main spindle 100 clamps the work piece 50 through the guide bush 30, and the work piece is processed through a tool mounted on the main tool rest while being clamped to the main spindle. The main spindle 100 is rotationally driven through a servo motor or a built-in motor separate from the main driving unit for moving the main spindle through a numerical control unit or PLC, and accordingly, the workpiece 50 clamped to the guide bush of the main spindle is the main spindle. It rotates in conjunction with the tool, and the tool mounted on the main tool rest moves and comes into contact with the rotating workpiece to process the workpiece.

The sub spindle 200 is installed on the top of the bed 10 so as to be adjacent to the main spindle 100 . In addition, the sub spindle 200 is movably installed on the bed 10 by the sub driving unit 40 . Although not shown in the drawings, the sub spindle also includes a guide bush, and the sub spindle 200 clamps the pre-machined workpiece 51 while being clamped to the main spindle through the guide bush. The workpiece 51 clamped to the sub-spindle 200 and already clamped to the main spindle is machined through a tool mounted on the sub-tool rest. The sub spindle 200 is also rotationally driven through a servo motor or a built-in motor separate from the sub driving unit that moves the sub spindle through a numerical control unit or PLC, and accordingly, the workpiece 51 clamped to the guide bush of the sub spindle is the sub spindle. It rotates in conjunction with the tool and the tool mounted on the sub tool rest moves and comes into contact with the rotating workpiece to process the workpiece.

That is, the main spindle, the sub spindle, the main tool rest, the sub tool rest, the main driving unit, and/or the sub driving unit are driven according to the machining program by the signal of the numerical control unit or PLC.

The control unit 400 checks whether the workpiece clamped simultaneously on the main spindle and the sub-spindle or clamped on any one of the main spindle and the sub-spindle is cut. That is, specifically, the control unit is clamped to the main spindle and the sub-spindle at the same time or to any one of the main spindle and the sub-spindle and the processed workpiece is clamped to the main spindle and the sub-spindle at the same time, or any one of the main spindle and the sub-spindle Check whether or not the workpiece is cut by comparing the positional deviation of the main spindle or sub-spindle in the clamped state. Specifically, the control unit 400 controls the sub-spindle to clamp the workpiece machined from the main spindle together with the main spindle, or the main spindle or the sub-spindle to the sub-spindle or the main spindle to clamp the pre-machined workpiece from the main spindle or the sub-spindle. By comparing the positional deviation of It performs the function to automatically check the presence or absence. As such, the control unit 400 cuts the workpiece clamped to the sub-spindle before machining the pre-machined workpiece clamped to the sub-spindle while the workpiece clamped to the main spindle is clamped to the sub-spindle as well as the main spindle. It performs a function to automatically check the presence or absence of the main spindle and the sub-spindle by comparing the positional deviation. In addition, the control unit 400, on the contrary, clamps the workpiece clamped to the sub-spindle to the main spindle as well as to the sub-spindle, or is clamped to the main spindle or the sub-spindle at the same time. It performs a function to automatically check whether the workpiece is cut by comparing the positional deviation of the main spindle and the sub-spindle in the clamped state.

This positional deviation may be generated when the main spindle or the sub-spindle is linearly fed, and may be generated by the rotation of the main spindle or the sub-spindle. Specifically, when the positional deviation is formed by linear feeding, the sub-spindle is clamped to the main spindle and is generated as the main spindle or sub-spindle moves relatively linearly while clamping the processed workpiece. When the positional deviation is formed by rotation, the sub-spindle is clamped to the main spindle and is generated as the sub-spindle and the main spindle rotate relatively while clamping the machined workpiece.

In addition, although not shown in the drawings, the device for confirming the work cut of the machine tool according to the present invention includes a numerical control unit and a PLC.

The numerical control unit includes NC (numerical control, NC) or CNC (computerized numerical control), and various numerical control programs are built-in. That is, the numerical control unit includes the main driving unit, the sub driving unit, the main spindle, the sub spindle, the main tool rest, and the servo motor driving program and the tool operating program, and the corresponding program is automatically executed according to the driving of the numeric control unit. loaded and working. In addition, the numerical control unit communicates with the PLC and the control unit 400 by a predetermined protocol.

In addition, the numerical control unit communicates with the servo motor used for driving the control unit, the PLC, the main and sub driving units of the main spindle and the sub spindle, the main tool rest and the sub tool rest, and the cutting unit, and feedback information from the servo motor is delivered

In addition, although not shown in the drawings, according to a preferred embodiment of the present invention, the numerical control unit includes a main operation unit, and the main operation unit includes a screen display program and a data input program according to the screen display selection, and the screen According to the output of the display program, a software switch is displayed on the display screen, and the ON/OFF of the software switch is recognized to give an input/output command for machine operation.

In addition, although not necessarily limited thereto, the main operation unit includes a monitor that is installed on the housing, case, or one side of the machine tool to display various function switches or buttons and various information.

A programmable logic controller (PLC) performs communication according to a predetermined protocol with the main spindle, sub spindle, main driving unit, sub driving unit, numerical control unit, control unit, and the like, and performs a function of executing control commands through such communication. That is, the PLC drives the main spindle, the sub spindle, the main driving unit, the sub driving unit, the main tool rest, the sub tool rest, and the cutting unit according to the numeric control unit and the numeric control program of the control unit.

Therefore, the workpiece cutting confirmation device of the machine tool according to the present invention is clamped to the main spindle in a machine tool having two spindles, and in a state in which the processed workpiece is clamped to the sub spindle, the positional deviation of the main spindle or the sub spindle of the workpiece By automatically checking whether the workpiece clamped on the sub spindle is cut before machining the workpiece clamped on the sub spindle by comparing it with the reference current value set in various ways according to the type, thickness, and machining program, the malfunction of the machine tool is prevented. It increases the lifespan of the machine tool by preventing damage or breakage of the tool or other equipment due to malfunction, and reduces the maintenance cost of the machine tool. By automatically checking, the user's convenience is improved, the machine tool is miniaturized by removing the unnecessary configuration of the machine part, and the overall manufacturing cost of the machine tool is reduced.

As shown in Figure 4, the control unit 400 of the workpiece cutting confirmation device 1 of the machine tool according to the present invention includes a storage unit 410, an analysis unit 420, a processing unit 430, a selection unit 440, and a display unit 450 .

The storage unit 410 stores various information for checking whether the workpiece clamped to the sub-spindle is cut. The storage unit 410 may be various storage devices such as ROM, RAM, EPROM, flash drive, hard drive, etc., and may be a web storage that performs a storage function of the storage unit 410 on the Internet. may be The operation of storing various information for checking whether the pre-processed workpiece clamped to the sub-spindle is cut in the storage unit 410 may be performed by the operator through the numerical control unit or the main operation unit, and may be stored in the PLC in the form of a program. have.

The analysis unit 420 compares the workpiece cutting confirmation-related information stored in the storage unit 410 with the positional deviation of the main spindle and/or sub-spindle to determine whether the pre-processed workpiece is cut by being clamped to the main spindle clamped to the sub-spindle. Analyze.

The processing unit 430 checks whether the pre-processed workpiece is cut by being clamped to the main spindle clamped to the sub-spindle according to the result of the analysis unit, and outputs a command signal or an alarm signal or corrects the data stored in the storage unit.

The selection unit 440 performs a function of selecting an automatic confirmation mode for cutting the pre-processed workpiece clamped to the main spindle clamped to the sub-spindle. Specifically, the selection unit 440 is formed in the form of a button on the display unit 450, etc. to be described later, and when the user performs an automatic workpiece cutting confirmation function through button operation, the control unit is clamped to the main spindle clamped to the sub spindle and pre-processed. Automatically check whether the workpiece is cut or not. Conversely, if the user does not perform the automatic workpiece cutting confirmation function through button operation, the workpiece cutting confirmation function is not performed and processing proceeds. As such, as the user arbitrarily selects whether to automatically check the cutting of the workpiece clamped to the main spindle and the sub-spindle as needed, the machining time can be reduced to maximize productivity and improve user convenience.

The display unit 450 may display the results of the storage unit 410 , the analysis unit 420 , and the processing unit 430 in real time to improve user convenience.

The display unit 450 includes a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (Flexible Display). display), a three-dimensional display (3D display), and an electronic ink display (e-ink display) may include at least one.

In addition, although not necessarily limited thereto, the display unit 450 receives various types of work information or processing program information or a user's operation command for confirming the cutting of the workpiece and displays the received operation command or workpiece cutting confirmation information to the numerical control unit, PLC, control unit It may be formed in the form of a touch screen that can be output as .

In addition, the display unit 450 includes a screen display program and a data input program according to screen display selection, and displays a software switch on the display screen according to the output of the screen display program, and turns ON/OFF of the software switch. ) and executes the function of issuing input/output commands for machine operation.

In addition, although not necessarily limited thereto, the display unit may be installed on the housing, case, or one side of the machine tool to display various function switches or buttons and various information.

As shown in Figure 4, the storage unit 410 of the control unit 400 of the workpiece cutting confirmation device 1 of the machine tool according to the present invention is a work data storage unit 411, a machining program storage unit 412, and and a reference data storage unit 413 .

The work data storage unit 411 stores work information about the work piece type and work piece thickness.

The machining program storage unit 412 stores a machining program for machining a workpiece. The machining program determines the linear movement or rotation of the main spindle and sub-spindle during machining of the workpiece, and the feed path of the main tool rest and sub-tool rest.

The reference data storage unit 413 stores a reference current value, a maximum current value, a minimum current value, or an error range set based on the work information and the machining program. Specifically, the reference data storage unit 413 stores four reference current values, a maximum current value, a minimum current value, or an error range in the form of a lookup table according to the type of the workpiece. That is, for example, in the case of a difficult-to-cut material such as titanium, it is stored in lookup table 1, in the case of a combustible material such as aluminum, it is stored in lookup table 2, and in the case of an intermediate material such as an alloy of steel and cast iron, it is stored in lookup table 3 In the case of general materials such as steel, such as iron, it can be saved as lookup table 4. In this way, the reference current value, the maximum current value, the minimum current value, or the error range are set and stored differently in the form of a look-up table of various types according to the thickness of the workpiece and the machining program, and the type and processing of the actually processed workpiece The position of the main spindle or sub-spindle in a state where the sub-spindle is clamped to the main spindle in a machine tool having two spindles and the pre-processed workpiece is clamped by extracting and comparing the stored reference value and the error range set differently according to the program Before machining the workpiece clamped on the sub-spindle by comparing the deviation, it is possible to automatically apply the cutting status of the workpiece clamped to the sub-spindle to various types of machine tools according to the workpiece type and machining program. Compatibility is increased and it can be applied to the machine tool quickly, so that the productivity of the machine tool can be maximized and the machining cost can be reduced by reducing the non-working time.

If the data not in the lookup table is calculated and used by the comparison unit of the analysis unit through linear interpolation and approximation, it is possible to safely and accurately check the work piece cut in all cases, improving the stability and reliability of the machine tool. It is possible to increase the performance of the machine tool.

As shown in Figure 4, the analysis unit 420 of the control unit 400 of the workpiece cutting confirmation apparatus 1 of the machine tool according to the present invention is a confirmation unit 421, a detection unit 422, and a comparison unit 423. includes

The check unit 421 checks the clamping or unclamping state of the main spindle 100 and the sub-spindle 200 . Specifically, the confirmation unit 421 checks the clamping or unclamping state of the pre-machined workpiece 51 clamped to either one of the main spindle and the sub-spindle or to the main spindle and the sub-spindle. That is, if the workpiece 50 clamped to the main spindle 100 and processed is unclamped without clamping itself to the sub spindle 200, the cutting confirmation result of the workpiece is highly likely to be in an abnormal state, and accurate determination is not possible. So, check this in advance. As a result of the confirmation of the confirmation unit 421 , when the pre-processed workpiece 51 clamped to the main spindle by the sub spindle 200 is unclamped, the signal is read and transmitted to the command unit, and an alarm signal is generated accordingly.

The detection unit 422 detects a positional deviation of the main spindle or sub-spindle in a state in which the sub-spindle 200 is clamped to the main spindle 100 and the processed workpiece 100 is clamped as a result of the confirmation of the confirmation unit. That is, the detection unit 422 is clamped to the clamped main spindle, and after the processed workpiece is clamped to the sub-spindle, when the main spindle or sub-spindle is linearly transferred by a signal from the numerical control unit or PLC, the main driving unit or The position deviation with respect to linear movement is detected by the current value by the pulse (PULSE) signal of the sub driver. Similarly, the detection unit 422 is clamped to the main spindle in the sub-spindle, and after the processed workpiece is clamped, when the main spindle or sub-spindle is rotated by a signal from the numerical control unit or PLC, the pulse ( PULSE) detects the position deviation due to rotation by the current value by the signal.

5 and 6, the horizontal axis represents time, and the vertical axis represents the current (PULSE) measured by the pulse encoder for the current value fed back to the servomotor. In addition, in FIGS. 5 and 6 , a solid line indicates a positional deviation and a dotted line indicates a reference current value.

As shown in FIG. 5, when the workpiece clamped to the main spindle clamped to the sub spindle and processed is normally cut by the cutting unit, the reference current value and the positional deviation (current value) are generated to be approximately the same value.

As shown in FIG. 6, when the workpiece clamped to the main spindle clamped to the sub spindle and processed is abnormally cut by the cutting unit, the reference current value and the positional deviation (current value) are generated to be different values.

The present invention detects the position deviation expressed by the current value not only in linear movement but also in rotation, compares it with the reference current value stored in the reference data, and compares whether the difference is within the error range to determine whether the workpiece is cut is checked automatically.

The comparison unit 423 compares the positional deviation detected by the detection unit with the reference current value stored in the reference data storage unit. That is, the comparison unit 423 calculates a difference between the positional deviation detected by the detection unit and the reference current value stored in the reference data storage unit.

In a machine tool having two spindles, the machine tool cutting confirmation device according to the present invention determines the positional deviation of the main spindle or the sub-spindle in a state in which the workpiece is clamped to the main spindle and is clamped to the sub-spindle. By automatically checking whether the workpiece clamped on the sub-spindle is cut before machining the workpiece clamped on the sub-spindle by comparing it with the reference current value set variously according to the thickness and machining program, it prevents malfunction of the machine tool and prevents malfunction. It is possible to increase the lifespan of the machine tool and reduce the maintenance cost of the machine tool by preventing damage or breakage of the tool or other equipment.

As shown in Figure 4, the processing unit 430 of the control unit 400 of the workpiece cutting confirmation device 1 of the machine tool according to the present invention is a command unit 431, an alarm unit 432, and a correction unit 433. includes

When the difference between the positional deviation detected by the comparison result detection unit of the comparison unit and the reference current value stored in the reference data storage unit is within an error range, the command unit 431 is clamped to the main spindle and the processed workpiece is clamped to the sub spindle. generates a cutting confirmation command signal to carry out machining, and outputs a cutting error command signal that stops the machining of the workpiece clamped to the sub-spindle when the error range is exceeded.

The alarm unit 432 warns of a cutting error when a cutting error command signal is output according to the result of the command unit, and outputs an alarm signal for collecting the workpiece clamped to the sub spindle.

Specifically, when the difference value between the positional deviation detected by the detection unit and the reference current value stored in the reference data storage unit by the comparison unit is included within the error range stored in the reference data storage unit, the command unit 431 may control the main clamped to the sub-spindle. The cutting confirmation command signal is output to carry out the machining of the workpiece clamped to the spindle while being clamped to the sub-spindle and transmitted to the numerical control unit or PLC to determine that the workpiece has been cut normally, and The sub-driver and the sub-tool rest are operated to perform the processing, and the subsequent process is performed. Conversely, when the difference between the positional deviation detected by the detection unit in the comparison unit and the reference current value stored in the reference data storage unit exceeds the error range stored in the reference data storage unit, the command unit 431 controls the workpiece clamped to the sub-spindle. Outputs a cutting error command signal to stop processing of The process of discharging the workpiece clamped to the sub-spindle is carried out.

As such, the device for confirming the cutting of the work piece of the machine tool according to the present invention is convenient for the user by quickly and automatically checking whether the work piece is cut in the machine tool having two spindles with the control unit through the positional deviation due to linear transfer or rotation. In addition to reducing the overall manufacturing cost of the machine tool, it is possible to read the corresponding signal and display an alarm when a cutting error command signal is generated and output. In addition, it is possible to quickly perform the process of discharging the cut-off workpiece clamped on the sub spindle to prevent and prevent damage to tools and equipment, thereby reducing manufacturing cost and preventing resource wastage.

The compensating unit 433 stores the position deviation detected from the detection unit in real time when a cutting confirmation command signal or a cutting error command signal is output through the command unit, and the reference current value stored in the real-time stored data in the reference data storage unit and correcting the reference current value and the error range stored in the reference data storage unit in real time by comparing with the error range.

That is, the compensator 433 corrects the reference current amount and error range of the positional deviation for checking whether the workpiece is cut in a machine tool having two spindles in real time, and the workpiece information according to the type of the workpiece and the thickness of the workpiece By changing and setting variously according to the type of workpiece and processing program, it automatically and accurately and quickly checks whether the workpiece is being cut, maximizing the stability and reliability of the machine tool, and increasing the compatibility and versatility for consumers. It maximizes the satisfaction of customers and maximizes productivity by reducing installation time.

A method for confirming the cutting of the work piece of the machine tool according to the present invention will be described with reference to FIG. 7 . As shown in Figure 7, the workpiece cutting confirmation method of the machine tool according to the present invention is a data storage step (S1), a signal receiving step (S2), a confirmation step (S3), a detection step (S4), a comparison step (S5) , a command signal output step (S6), an alarm signal output step (S7), and a correction step (S8). The overall operating principle control method and equipment configuration of the method for confirming the cutting of the work piece of the machine tool according to the present invention are the same as the above-described device for confirming the work cut of the machine tool according to the present invention. Hereinafter, the difference will be mainly described.

Before clamping and machining the workpiece clamped to the main spindle to the sub spindle, information for checking whether the workpiece clamped to the main spindle clamped to the sub spindle and machined is cut or not is stored. Specifically, the user stores the workpiece-related data, such as the workpiece type and workpiece thickness, and information corresponding to the processing program, reference current value, and error range in the storage unit through the main operation unit, PLC or display unit of the numerical control unit.

After the data storage step (S1), the signal for the operation of checking whether the cut of the processed workpiece is clamped to the main spindle through the selection unit 440 is received. That is, if the user does not activate the automatic work-cutting confirmation function through the selection unit 440, the work-cutting automatic confirmation process is not performed.

After the signal receiving step (S2), the confirmation unit 421 checks the clamping or unclamping state of the workpiece clamped to the sub spindle. As a result of the confirmation of the confirmation unit 421, if the workpiece clamped to the main spindle and processed by the sub spindle is unclamped, a signal is transmitted to the alarm unit, and the alarm unit reads out the signal and displays it on the display unit. In addition, the alarm signal is not necessarily limited to the display unit, and includes both visual and audible alarms such as a warning light and a siren.

After the confirmation step (S3), the workpiece clamped to the main spindle and the sub-spindle simultaneously in the detection unit 422 or clamped to either the main spindle and the sub-spindle is clamped by the main spindle or the sub-spindle. Detect positional deviation. That is, as described above, when the main spindle or sub-spindle is linearly fed, the positional deviation is detected for linear feeding, and when the main or sub-spindle is rotating, the rotational positional deviation is detected.

After the detection step S4, the difference between the position deviation detected by the comparator 423 and the reference current value is calculated.

After the comparison step (S5), if the difference between the position deviation and the reference current value detected according to the comparison result by the command unit 431 is within the error range, the pre-processed workpiece is clamped to the main spindle clamped to the sub spindle. Outputs a cutting confirmation command signal to perform processing and transmits it to the numerical control unit or PLC. It outputs a cutting error command signal that is clamped to the main spindle clamped in the .

After the command signal output step, when a cutting error command signal is output from the command unit 431, a cutting error is warned and an alarm signal for collecting the workpiece clamped on the sub spindle is output. Specifically, when a cutting error command signal is output from the command unit 431, the alarm unit 432 reads the corresponding signal and outputs an alarm signal from the alarm unit to warn of the cutting error through the display unit, and at the same time When a cutting error command signal is output from the command unit 431, the alarm unit 432 reads the signal and outputs an alarm signal so that the workpiece clamped to the main spindle clamped to the sub spindle can be collected. It transmits to the numerical control unit and PLC to operate the equipment for collection of the workpiece.

After outputting the alarm signal (S7), when the cutting confirmation command signal or cutting error command signal is output from the correction unit 433, the detected position deviation is stored in real time, and the stored data in real time is used as a reference current value and By comparing the error range, the pre-stored reference current value and the error range are corrected in real time.

Accordingly, the device and method for checking the workpiece cutting of a machine tool according to the present invention automatically check whether or not the workpiece is cut in a machine tool having two spindles with the control unit through positional deviation due to linear feed or rotation. It is possible to improve the user's convenience, to reduce the size of the machine tool by removing the unnecessary configuration of the machine part, and to reduce the overall manufacturing cost of the machine tool.

In addition, the method for confirming the cutting of the workpiece in the machine tool according to the present invention corrects the reference current amount and error range of the positional deviation for checking whether the workpiece is cut in a machine tool having two spindles in real time, and the type of the workpiece and the workpiece By changing and setting variously according to the workpiece information and processing program according to the thickness of the machine tool, the stability and reliability of the machine tool can be maximized by accurately and quickly automatically checking whether the workpiece is being cut by the type of the workpiece and the processing program. .

Furthermore, the method for confirming the cutting of the work piece of the machine tool according to the present invention compares the positional deviation of the main spindle or the sub spindle in a state where the sub spindle clamps the pre-machined work in the main spindle in a machine tool having two spindles. It automatically determines whether the pre-machined workpiece clamped on the sub-spindle is cut before machining the processed workpiece with the sub-spindle clamped with the sub-spindle. Compatibility is increased, and it can be applied quickly to the machine tool, thereby maximizing the productivity of the machine tool by reducing the non-working time and reducing the machining cost.

In the detailed description of the present invention described above, it has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those having ordinary knowledge in the technical field of the present invention described in the claims to be described later It will be understood that various modifications and variations of the present invention can be made without departing from the spirit and scope of the present invention. Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1: Workpiece cutting confirmation device of a machine tool, 10: Bed,
20: guide bush, 30: main driving part,
40: sub driving unit, 50: work piece,
51: pre-processed workpiece;
100: main spindle, 200: sub spindle,
300: cutting unit, 400: control unit,
410: storage unit, 411: work data storage unit,
412: processing program storage unit, 413: reference data storage unit,
420: analysis unit, 421: confirmation unit,
422: detection unit, 423: comparison unit,
430: processing unit, 431: command unit,
432: alarm unit, 433: correction unit,
440: selection unit, 450: display unit.

Claims (12)

a main spindle clamping the workpiece to machine it;
a sub-spindle clamped to the main spindle to clamp the machined workpiece;
a cutting unit for cutting the workpiece clamped to at least one of the main spindle and the sub spindle; and
and a control unit for checking whether a workpiece clamped simultaneously on the main spindle and the sub-spindle or clamped on any one of the main spindle and the sub-spindle is cut.
According to claim 1,
The control unit is
A state in which a workpiece clamped simultaneously on the main spindle and the sub-spindle or clamped on either the main spindle and the sub-spindle is clamped simultaneously on the main spindle and the sub-spindle, or any of the main spindle and the sub-spindle In a state clamped to one, the machine tool cutting confirmation device, characterized in that by comparing the positional deviation of the main spindle or the sub spindle to confirm whether the workpiece is cut.
3. The method of claim 2,
The position deviation is a workpiece cutting confirmation device of a machine tool, characterized in that generated by the linear feed of the main spindle or the sub-spindle or the rotation of the main spindle or the sub-spindle.
3. The method of claim 2,
The control unit is
a storage unit for storing information for checking whether the workpiece clamped on the sub spindle is cut;
an analysis unit that compares the information stored in the storage with a positional deviation of the main spindle or the sub-spindle to analyze whether the workpiece clamped to the sub-spindle is cut; and
and a processing unit for checking whether the workpiece clamped on the sub-spindle is cut according to the result of the analysis unit.
5. The method of claim 4,
The storage unit,
a workpiece data storage unit for storing workpiece information on the workpiece type and workpiece thickness;
a machining program storage unit for storing a machining program for machining a workpiece; and
A reference data storage unit for storing a reference current value, a maximum current value, a minimum current value, or an error range set based on the workpiece information and the machining program;
6. The method of claim 5,
The analysis unit,
a confirmation unit for confirming clamping or unclamping states of the main spindle and the sub-spindle;
a detection unit configured to detect a positional deviation of the main spindle or the sub-spindle in a state in which the sub-spindle is clamped to the main spindle and the processed workpiece is clamped; and
and a comparison unit for comparing the positional deviation detected by the detection unit with a reference current value stored in the reference data storage unit.
7. The method of claim 6,
The processing unit,
As a result of the comparison of the comparison unit, if the difference between the positional deviation detected by the detection unit and the reference current value stored in the reference data storage unit is within an error range, a cutting confirmation command signal is issued to perform processing of the workpiece clamped to the sub-spindle. a command unit for outputting a cutting error command signal to stop the machining of the workpiece clamped to the sub-spindle when the error range is exceeded; and
An alarm unit for warning a cutting error when a cutting error command signal is output according to the result of the command unit and outputting an alarm signal for collecting the workpiece clamped on the sub spindle; cut check device.
8. The method of claim 7,
The processing unit,
When a cutting confirmation command signal or a cutting error command signal is output through the command unit, the position deviation detected from the detection unit is stored in real time, and the data stored in real time is stored in the reference data storage unit. and a compensating unit for correcting the reference current value and the error range stored in the reference data storage unit in real time as compared with;
5. The method of claim 4,
The control unit is
a selection unit for selecting an automatic confirmation mode for cutting the workpiece clamped on the sub-spindle; and
The storage unit, the analysis unit, and a display unit for displaying the results of the processing unit; Machine tool cutting confirmation device for a machine tool, characterized in that it further comprises a
Storing information for checking whether the workpiece clamped to the main spindle is clamped and machined by the sub spindle before machining;
receiving a signal for checking whether the workpiece clamped on the sub-spindle is cut;
checking a clamping or unclamping state of the workpiece clamped to the sub-spindle;
Detecting a positional deviation of the main spindle or the sub-spindle while the sub-spindle clamps the workpiece clamped simultaneously to the main spindle and the sub-spindle or clamped to either the main spindle and the sub-spindle ;
comparing the detected positional deviation with a reference current value; and
According to the comparison result, if the difference between the detected positional deviation and the reference current value is within the error range, the sub-spindle outputs a cutting confirmation command signal to perform machining of the clamped workpiece, and if it exceeds the error range, the Outputting a cutting error command signal to stop the machining of the clamped workpiece in the sub spindle;
11. The method of claim 10,
After outputting the command signal,
When a cutting error command signal is output, warning a cutting error and outputting an alarm signal for collecting the workpiece clamped to the sub spindle;
12. The method of claim 11,
After outputting the alarm signal,
When the cutting confirmation command signal or cutting error command signal is output, the detected positional deviation is stored in real time, and the stored data is compared with the reference current value and the error range to correct the pre-stored reference current value and the error range in real time. A method for confirming the cutting of a work piece by a machine tool, comprising the step of:

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